George vincent fosbery and heney i iepe



(No Model.)

G. V. FOSBERY 8: H. PIEPER.

METALLIC PATCH FOR BULLETS. No. 291,891. Patented Jan. 15, 1884.

1 W/Mw W W 6 M horizontal Fig. 6 an envelope having a perforated cir- GEORGE T 13TH FOSBERY AND HEXRY PllGPlCll, (ll Lilltlli, 'lililiilt'll METALLEG PATH FOR BULLETS.

SPECIFICATION forming part of Letters Patent No. 291,891,

Application filed May 31,

i To all whom it may concern.-

paper, and constructed or shaped, as herein-' after described.

In the following description reference will be had to the accompanying drawings, which illustrate the invention, and of which Figure lis a partial section through a cartridge-shell, while Fig. 2 shows a piece of sheet inetal from which the envelope may be made, and Fig. 3 such envelope. Fig. l is a side view of an envelope provided at the open end with circular teeth or horizontal ridges; Fig. 5, an envelope provided with andwith vertical indentations, and

cumference.

The sheet serving as raw material for the envelope is cut into the form of a cross or other convenient shape, with edges straight or inclined at any convenient angle. (See A, Fig. 2.) It is then formed in a die into a cylinder closed at one end, and of such a size that it allows the bullet toente'r the envelope and v the envelope to enter the cartridge. (See Fig.

3.) -We curve this envelope slightly outward at its upper edge, b, and prefer to provide the part projecting beyond the cartridge with circular teeth or ridges c c, or with a screwthread. These teeth may have a depth equal to that of the grooving of the rifle. The indentations or intervals between the teeth may be filled with a lubricant-preferably a mixture of Vaseline and parafiine. The sides of the envelope may also be perforated,as shown in Fig. 6, and the holes filled with the same lubricant. A paper lining may also be inserted between the envelope and the project ile, Fig. 6, or only a part of the envelope may be covered with paper. The lower part of the envelope, which enters the cartridge,

may be grooved or toothed vertically to give Wted January 15, 1884.

No model.)

better adherence to the bullet. The bottom (Z of the envelope may be flat, convex, or concave. By pressing the metal inward round the lower edge, e, a gascheck may be formed. (See Fig. 1.) \Vhen the projectile leaves the muzzle of the rifle, the envelope will be sepa rated from the projectile, because the upper surface or edge of the envelope inclined outward, and the metal possesses some elasticity.

In order to render the drawings more intelligible, the thickness of the sheet metal, the depth of the indentations, and the enlargement of the upper edge are exaggerated.

In using these envelopes we intend to attain the following advantages: First, the employment of a shallower rifling in the gun-barrel.

than that at present in use, and to obtain at the same time a better hold on the riding, so

as to enable very hard metal to be used for the bullets-for instance, steel; second. a more perfect clearing of the barrel and riding at each shot fired; third, a better lubrication of the barrel; fourth, the use of a projectile harder and less liable to deformation; fifth, a supplemental and efiicient gas-check.

It is evident that the details of construction may differ from those represented by the d rawings without departing from our invention.

\Vhat we claim is-- 1. A metallic envelope for projectiles of rifled small-arms, the sides of which envelope are formed by sections with theirupper edges inclined outward,for the purpose of detaching the envelope from the projectile when the lat ter leaves the muzzle of the rifle, substantially as described.

2. A metallic envelope for pro ectiles of rifled small-arms, open at the front end, and provided with circumferential ridges or teeth of sufficient diameter to project into the grooves of'the rifle while the projectile passes i. A metallic envelope for projectiles of rifled small-arms, open at the front end, and having the front edge turned outward,whi1e the bottom of the envelope is dished, substantially and for the purposes described.

5. A metallic envelope for projectiles of rifled small-arms, open at the front end, the front edge being turned outward, while the bottom is dished, and the sides are provided with circumferential ridges or teeth of sufficient diameter to project into the grooves of t the rifle, substantially as and for the purposes, described.

6 A metallic envelope for projectiles of rifled small-arms, open at the front end, and provided near its open end with projecting 15 circumferential ridges or teeth and near its base with indentations, substantially as and for the purposes described.

In testimony whereof we have signed this specification in the presence of two subscribing 20 witnesses.

GEORGE "INOENT FOSBERY. H. PIEPER. Vitnesses: v

HEssELs, J ULEs HAMAL. 

